HDPE Composite Geomembrane
1.Good mechanical properties: High tensile strength, good toughness, can withstand large tensile forces and deformations, and is not easy to break.
2.Excellent weather resistance: Strong resistance to ultraviolet rays and aging, long service life, and reduced post - maintenance costs.
3.Excellent anti - seepage performance: The high - density polyethylene material itself is impermeable to water. The composite structure further enhances the anti - seepage effect, effectively preventing liquid leakage.
4.Strong chemical stability: Resistant to corrosion by chemical substances such as acids, alkalis, and salts, and adaptable to various complex geological and environmental conditions.
5.Environmental protection and safety: The material is non-toxic,non-pollution to the environment, and meets environmental protection requirements.
6.Convenient construction: Lightweight and easy to assemble, it can improve construction efficiency and shorten the construction period.
Product Introduction:
HDPE Composite Geomembrane is a seepage - proof composite material made by thermally compounding or adhesively bonding a high - density polyethylene membrane with non - woven fabric (or other geotechnical materials). Its structure is usually "membrane - fabric - membrane" or "fabric - membrane - fabric", combining the seepage - proof property of the HDPE membrane and the mechanical support property of the non - woven fabric.
Core performance characteristics
Excellent anti-seepage ability: The HDPE membrane itself has an extremely low permeability (close to zero), and the composite structure further prevents pore leakage, making it suitable for liquid anti-seepage projects (such as reservoirs and landfills).
High Strength and Durability: High tensile strength (≥15MPa), tear-resistant, puncture-resistant, and can withstand foundation settlement or external impacts. Strong anti-aging performance, resistant to ultraviolet rays, high and low temperatures (-70℃~+70℃), and the service life can reach more than 50 years.
Outstanding chemical stability: Resistant to the corrosion of acid, alkali, salt solutions and organic solvents, suitable for complex environments such as chemical pollution sites and tailings ponds.
Construction convenience: The material has good flexibility, can adapt to uneven terrain, and has various splicing methods (hot melt welding, gluing). The welding strength is more than 80% of the base material. It is lightweight (1000 - 3000g/m²), and the transportation and laying efficiency is high.
Product Parameters:
project | metric | ||||||||
| Nominal fracture strength/(kN/m) | 5 | 7.5 | 10 | 12 | 14 | 16 | 18 | 20 | |
| 1 | Longitudinal and transverse fracture strength/(kN/m) ≥ | 5 | 7.5 | 10 | 12 | 14 | 16 | 18 | 20 |
| 2 | Longitudinal and transverse standard strength corresponding elongation/% | 30~100 | |||||||
| 3 | CBR top penetration strength /kN ≥ | 1.1 | 1.5 | 1.9 | 2.2 | 2.5 | 2.8 | 3 | 3.2 |
| 4 | Longitudinal and transverse tearing strength /kN ≥ | 0.15 | 0.25 | 0.32 | 0.4 | 0.48 | 0.56 | 0.62 | 0.7 |
| 5 | Peel strength/(N/cm)> | 6 | |||||||
| 6 | Vertical permeability coefficient/(cm/s) | As required by design or contract | |||||||
| 7 | Width deviation /% | -1 | |||||||
| project | film thickness /mm | ||||||||
| 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 1 | ||
| Resistant to static water pressure /MPa ≥ | One cloth, one membrane | 0.4 | 0.5 | 0.6 | 0.8 | 1 | 1.2 | 1.4 | 1.6 |
| Two cloth and one film | 0.5 | 0.6 | 0.8 | 1 | 1.2 | 1.4 | 1.6 | 1.8 | |
| Note: If the film thickness is between adjacent specifications in the table, the corresponding assessment index shall be calculated by linear interpolation; if it exceeds the range in the table, the assessment index shall be determined by negotiation between the supplier and the demander. | |||||||||
Product Applications:
Water Conservancy Engineering Field
Reservoirs and Dams: As the anti-seepage lining of the dam body, it prevents reservoir leakage and ensures water storage capacity (such as anti-seepage of the reservoir dam foundation and dam slope).
Channels and Irrigation Projects: It is used for the anti-seepage treatment of irrigation canals and diversion canals, reducing water resource loss and improving water conveyance efficiency.
Artificial Lakes and Rivers: Anti-seepage of the bottom of artificial lakes and river slopes, maintaining the water body landscape effect and avoiding water body seepage and loss.
Transportation and Civil Engineering
Highway and Railway Subgrade: Laid under the subgrade to prevent subgrade settlement caused by groundwater seepage and to isolate miscellaneous fill from foundation soil.
Tunnels and Underground Engineering: Waterproofing of tunnel linings and seepage prevention of underground utility tunnels to reduce the erosion of the structure by groundwater infiltration.
Airport and Port Engineering: Seepage prevention of airport runway foundations, anti-scour and seepage prevention treatment of port wharves to improve the durability of the project.
Agricultural and Fishery Engineering
Aquaculture: Seepage prevention at the bottom and slopes of fish ponds, shrimp ponds, and crab ponds to maintain stable water levels and reduce the frequency of water changes (such as in high - density culture ponds).
Agricultural Water Storage Projects: Seepage prevention in reservoirs and irrigation ponds to ensure the reserve of agricultural water in arid areas.
Saline - Alkali Land Improvement: Block the rise of underground saltwater and cooperate with the drainage and irrigation system to improve the problem of soil salinization.
Environmental Protection and Municipal Engineering
Landfill: As the anti-seepage lining at the bottom and slopes of the landfill, it blocks the leakage of leachate and prevents soil and groundwater pollution. Sewage Treatment Facilities: Anti-seepage treatment of sewage treatment tanks, regulating tanks, and oxidation ponds to avoid environmental pollution caused by sewage leakage.
Hazardous Waste and Industrial Waste Yards: Isolate hazardous waste, prevent the penetration and diffusion of harmful substances, and meet the environmental protection anti-seepage standards.
Energy and Mining Engineering
Tailings Ponds and Slag Yards: Prevent seepage of tailings wastewater from polluting the surrounding environment, and at the same time reinforce the slope stability of the yard.
Petrochemical Sites: Implement ground anti-seepage measures for oil depots and chemical raw material storage tank areas to avoid oil or chemical penetration and soil pollution.
New Energy Projects: Conduct anti-seepage for the foundations of photovoltaic power plants and the bottoms of biogas digesters to ensure the safe operation of the facilities.
Applications in Special Scenarios
Constructed Wetlands: The bottom of the wetland is impermeable to maintain the water level and support the construction of the ecosystem.
Military Engineering: Impermeability of underground works and waterproofing of temporary water storage facilities to adapt to complex field environments. Cultural Relic Protection: Impermeability of the backfill area of archaeological sites to prevent the erosion and damage of cultural relics by groundwater.
With its anti - seepage performance, mechanical strength and weather resistance, HDPE Composite Geomembrane can play a core role in various projects that require "seepage prevention, corrosion resistance, reinforcement and isolation", especially in projects with high requirements for environmental protection and durability.
